Bearing-plate for springs.



PATENTED DEC. 29, 1903.

0; A. LINDSTRUM. BEARING PLATE FOR SPRINGS.

APPLICATION FILED OUT. 11, 1902.

N0 MODEL.

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m: NORRIS PETERS no wumourua. WASHINGTON. 0.0.

UNITED STATES Patented December 29, 1903.

PATENT OFFICE.

BEARING-PLATE FOR SPRINGS.

SPECIFICATION forming part of Iletters Patent No. 748,512, datedDecember 29, 1903.

Application filed October 11,1902. Serial No. 126,937- (No model.)

To all whom it may concern.-

. Be it known that I, CHARLES A. LiNns'raoM, a citizen of the UnitedStates,and a resident of Allegheny, Allegheny county, Pennsylvania, haveinvented certain Im provements in Bean ing-Plates for Springs, of whichthe followbeing had to the accompanying drawings, in-

which 7 Figure 1 is a view illustrating my invention as applied to areinforcingsprin g of the character shown in my Letters Patent No.687,692, dated November 26, 1901. Fig.2 is an enlarged view of part ofthe end of the spring and of the hanger with its key and interposedbearing devices, and Fig. 3 is a view illustrating the application of myinvention to the ordinary form of spring-hanger.

In Fig.1 of the drawings part of the frame of a locomotive, one of theaxles, and'one of the axle-boxes are shown in dotted lines in connectionwith a semi-elliptic spring 2, reinforcing-spring 3, and hangers 4:, asin my previous patent, before alluded to, the keys 6 of the hangersbearing upon the ends of the supplementary or reinforcing spring 3,which in turn bear upon rockers 5, as in said patented structure. Ifthese rockers bear directly upon the upper leaf of the spring 2, thestrain is so concentrated upon a limited area of the spring thatbreakage of the latter frequently results even if the end portion of thespring is reinforced by turning the upper leaf back upon itself orswaging a thickened seat thereon,and such breakage renders the springuseless. In order to overcome this objection,

I interpose between the rocker 5 and the upper leaf of the spring a shoe10, preferably recessed in its upper face for thelreception of therounded lower bearing of the rocker and having a lower face whichprovides an extended bearing upon the upper leaf of the spring, therebydistributing the strain throughout the entire end portion of the springand preventing the breaking of the latter under heavy loads.

In order to longitudinally lock the shoe 10 to the upper leaf of thespring, the end of said leaf is bent upwardly, so as to forma lip 11,which enters a slot 12, formed in the under side of the shoe, as shownin Fig. 2, and thus prevents any longitudinal movement of the shoe inrespect to the spring.

In Fig. 3 Ihave illustrated the application,

of my invention to an ordinary form of spring construction, the key 6 ofthe hanger in this case bearing directly upon the shoe 10 and thesupplementary reinforcingspring and its rocker being dispensed with.

In case of breakage of the shoe or injury to the same said shoe can bereadily replaced, the spring itself not being impaired.

When the end portion of the spring is slotted for the passage of thehanger-bar 4, the shoe 10 will be likewise slotted, as indicated bydotted lines in Fig. 2.

Having thus described my invention, I claim and desire to secure byLetters Patcut-- The combination of the semi-elliptic spring providedwith vertical slots through its end portions and having the ends of itslong leaf formed with a vertical offset extending across the leaf,bearing-plates placed on the end portions of said leaf and provided withtransverse grooves extending through the sides of the plates and withslots coinciding with the slots in the leaf, and hangers passing throughsaid slots, as set forth and shown.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. n

CHARLES A. LINDSTROM.

Witnesses:

A. Simon, J. O. LANGFITT.

